A type of electrical connector commonly used to carry audio and video signals. In the most normal usage, cables have a standard plug on each end, consisting of a central male connector, surrounded by a ring. Devices mount the jack, consisting of a central hole with a ring of metal around it.
Plugs and sockets on consumer equipment are conventionally colour-coded to aid correct connections. For example yellow for composite video, red for the right channel, and white or black for the left channel of stereo audio. This trio (or pair) of jacks can be found on the back of almost all audio and video equipment.
The name 'RCA' derives from the Radio Corporation of America, which introduced the design by the early 1940s to allow mono phonograph players to be connected to amplifiers. RCA Plugs are also commonly referred to as Phono Plugs.